Best air purifiers of 2026: WIRED picks Coway Mighty2 and IQAir Atem X

What WIRED recommends

WIRED has updated its guide to the best air purifiers, published on 11 November 2026, with new picks for different rooms and budgets. According to the publication, the Coway Airmega Mighty2, priced at $270, is the best choice for most people. The IQAir Atem X, at $1,400, is the premium pick for readers who value design and long-term repairability over price.

The November refresh also adds two new models: the Molekule PECOAir+ and the IQAir Atem Desk Air Purifier. Some older picks were removed, and prices and links were checked across the guide.

How the purifiers were tested

The reviewer, who says they have lived through severe wildfire smoke in Los Angeles and San Francisco and now deals with traffic fumes, cooking fumes and pet dander in a small New York apartment, uses a uniform testing method for every unit.

Each purifier is tested in a sealed tent filled with smoke from pellets. The reviewer measures how long the machine takes to clear the smoke visually, then how long the air takes to return to healthy readings using an air quality monitor and the purifier's own app or display. Noise levels are measured with a decibel meter in sleep, auto and maximum modes, and each unit is used for nearly a month in different spots around the home, including beside an unventilated gas stove and a cat's litter box.

Why the Coway Airmega Mighty2 leads the list

The Mighty2 is the updated version of WIRED's former budget pick, the Airmega Mighty. The publication describes it as quiet, compact and reliable, though it lacks extras such as a connected app or a remote.

The machine has a larger purification system than its predecessor, with a prefilter for larger particles, a carbon filter for odours and a HEPA filter, which traps very small airborne particles, for microscopic pollutants. The carbon and HEPA filters are combined into one piece that needs replacing once a year, twice the typical lifespan.

Coway says the Mighty2 can clean the air in up to 1,800 square feet in one hour, or 900 square feet in 30 minutes. It has real-time air quality index detection and a MegaScan laser that measures particles from PM 1.0 up to PM 10, covering sizes from microscopic viruses to pet fur. Smart features include automatic fan speed adjustment based on air quality, a sleep mode that engages after three minutes of darkness, and timer settings from one to 12 hours.

In WIRED's smoke test, the Mighty2 stayed quiet on auto mode, reaching about 70 decibels only on the highest setting, and cleared smoke in around four minutes.

The premium option: IQAir Atem X

WIRED's upgrade pick is the IQAir Atem X, which the reviewer describes as the best HEPA filter in the guide. The publication frames the purchase as a long-term investment, using the term air purifier math to describe how many cheaper units a household might replace over a decade.

The Atem X is quiet, has custom settings, a built-in sensor and a phone app dashboard, and can sit flush against a wall. With registration and a filter subscription, buyers can opt for a 10-year warranty that covers parts and repairs. The main drawback, according to WIRED, is that it has no carbon filter, so it cannot remove gases.

A further pick mentioned in the guide is the Coway Airmega 450, a 30-inch cylinder tower weighing just under 25 pounds, listed at $499 and described as the choice for VOCs and odours.

Why air purifiers matter

WIRED's reviewer notes that the case for a purifier depends on where you live and what you are trying to remove. Outdoor threats include wildfire smoke drifting down from Canada, pollen spikes and industrial emissions, while indoor threats include pet dander, cooking fumes and allergens that affect allergy sufferers in the same household.

For readers choosing between the picks, the guide's advice is straightforward: the Mighty2 covers large rooms at a low price and needs little attention, while the Atem X suits buyers planning to keep one machine for years. The publication says testing of new models continues, so the guide is updated regularly.